One Hypothesis of Synesthesia Is

One hypothesis of synesthesia is:

A) that all of the axons from one cortical area have more branches into that cortical area.
B) that all of the axons from one cortical area have branches into another cortical area.
C) that some of the axons from one cortical area have branches into another cortical area.
D) that some of the axons from one cortical area have more branches into that cortical area.